Pol-1155 error when attempting to update ffxi

While attempting to download the latest version update I keep getting the error code POL-1155 and at the bottom of the message it says D:ffxiMain.dll. Can someone help me figure what to do to fix this?

I'd hate to do a total reinstall just to get the same message. I've done a file check through POL and a system restore so far and nothing's worked. I don't understand why it's bringing up the disk drive when I'm downloading from PlayOnline either. The ffxiMain.dll is located on my C: drive already.

Maybe this thread will help?

Thanks! I was able to fix it and log in.